Shelving unit



FIG. 1 is a front elevational view with the opposite side view being a mirror image of a shelving unit showing the new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is an end elevational view with the opposite end view being a mirror image thereof; and,

FIG. 5 is a perspective view thereof; 

I claim the ornamental design for a shelving unit, as shown and described. 